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    Reliable Dual Sub-Carrier Modulation Schemes in High Efficiency WLAN
    2.
    发明申请
    Reliable Dual Sub-Carrier Modulation Schemes in High Efficiency WLAN 审中-公开
    高效WLAN中可靠的双子载波调制方案

    公开(公告)号：US20160352552A1

    公开(公告)日：2016-12-01

    申请号：US15164690

    申请日：2016-05-25

    Applicant: MEDIATEK INC.

    Inventor： Jianhan Liu ,  Tianyu Wu ,  Thomas Edward PARE, JR. ,  YungPing Hsu

    IPC: H04L27/26 ,  H04L5/00 ,  H04B1/7176

    Abstract: Modulation schemes that use dual sub-carrier to reliably transmit physical layer related signaling information and/or data in high efficiency wireless local area network (HE WLAN) are proposed. The proposed schemes can be implemented with low complexity and provide better performance than existing modulation schemes used in WLAN that are based on IEEE 802.11/a/b/g/n/ac standards. The proposed schemes enhance the reliability of transmissions, especially under narrow band interferences. In accordance with a novel aspect, dual subcarrier modulation (DCM) is introduced in HE WLAN. DCM can introduce frequency diversity into OFDM systems by transmitting the same information on two subcarriers separated in frequency. A DCM indication scheme is used such that both encoding and decoding of DCM is really simple.

    Abstract translation: 提出了使用双子载波在高效率无线局域网（HE WLAN）中可靠传输物理层相关信令信息和/或数据的调制方案。 所提出的方案可以以低复杂度实现，并且比基于IEEE 802.11 / a / b / g / n / ac标准的WLAN中使用的现有调制方案提供更好的性能。 所提出的方案增强了传输的可靠性，特别是在窄带干扰下。 根据一个新颖的方面，在HE WLAN中引入了双副载波调制（DCM）。 DCM可以通过在频率上分离的两个子载波上发送相同的信息来将频率分集引入OFDM系统。 使用DCM指示方案，使得DCM的编码和解码都非常简单。

    Main Lobe and Grating Lobe Identification for Direction Finding
    3.
    发明申请
    Main Lobe and Grating Lobe Identification for Direction Finding 审中-公开
    方向寻找的主叶片和光栅叶片识别

    公开(公告)号：US20160033614A1

    公开(公告)日：2016-02-04

    申请号：US14817938

    申请日：2015-08-04

    Applicant: MEDIATEK INC.

    Inventor： James June-Ming Wang ,  Kai-Chun Chou ,  YungPing Hsu

    IPC: G01S3/74 ,  G01S3/46

    CPC classification number: G01S3/46 ,  G01S3/043 ,  G01S3/14 ,  G01S3/42 ,  G01S3/74

    Abstract: A method of direction finding (DF) positioning involving main lobe and grating lobe identification in a wireless communication network is proposed. A receiver performs DF algorithm on radio signals associated with multiple antennas over a first channel frequency and estimates a first set of DF solutions. The receiver performs DF algorithm on radio signals associated with multiple antennas over a second channel frequency and estimates a second set of DF solutions. The receiver then identifies the correct DF solution (e.g., the main lobe direction) by comparing the first set of DF solutions and the second set of DF solutions.

    Abstract translation: 提出了一种在无线通信网络中涉及主瓣和光栅识别的方向查找（DF）定位方法。 接收机对与第一信道频率上的多个天线相关联的无线电信号执行DF算法，并估计第一组DF解。 接收机在第二信道频率上对与多个天线相关联的无线电信号执行DF算法，并估计第二组DF解。 然后，接收机通过比较DF溶液的第一组和第二组DF溶液来识别正确的DF溶液（例如，主瓣方向）。

    Main lobe and grating lobe identification for direction finding
    4.
    发明授权
    Main lobe and grating lobe identification for direction finding 有权

    公开(公告)号：US10048349B2

    公开(公告)日：2018-08-14

    申请号：US14817938

    申请日：2015-08-04

    Applicant: MEDIATEK INC.

    Inventor： James June-Ming Wang ,  Kai-Chun Chou ,  YungPing Hsu

    IPC: G01S5/02 ,  G01S3/46 ,  G01S3/04 ,  G01S3/42 ,  G01S3/14 ,  G01S3/74

    Abstract: A method of direction finding (DF) positioning involving main lobe and grating lobe identification in a wireless communication network is proposed. A receiver performs DF algorithm on radio signals associated with multiple antennas over a first channel frequency and estimates a first set of DF solutions. The receiver performs DF algorithm on radio signals associated with multiple antennas over a second channel frequency and estimates a second set of DF solutions. The receiver then identifies the correct DF solution (e.g., the main lobe direction) by comparing the first set of DF solutions and the second set of DF solutions.

    Spatial Reuse Parameters for Opportunistic Adaptive TPC and CCA
    6.
    发明申请
    Spatial Reuse Parameters for Opportunistic Adaptive TPC and CCA 有权
    机会自适应TPC和CCA的空间重用参数

    公开(公告)号：US20170070962A1

    公开(公告)日：2017-03-09

    申请号：US15257074

    申请日：2016-09-06

    Applicant: MEDIATEK INC.

    Inventor： James June-Ming Wang ,  Jianhan Liu ,  Chao-Chun Wang ,  YungPing Hsu

    IPC: H04W52/24 ,  H04W16/02 ,  H04B17/345 ,  H04W74/08

    CPC classification number: H04W52/243 ,  H04B17/345 ,  H04W16/02 ,  H04W52/146 ,  H04W52/241 ,  H04W52/242 ,  H04W52/245 ,  H04W52/247 ,  H04W52/50 ,  H04W74/0816 ,  H04W84/12

    Abstract: A method of spatial reuse with opportunistic transmit power control (TPC) and clear channel assessment (CCA) is proposed. In the opportunistic TPC and CCA, a spatial reuse station (SR-STA) gains enough knowledge in certain situation for more aggressive spatial reuse such that its transmit power may be adjusted to meet the spatial reuse conditions based on the received OBSS PPDU and the corresponding spatial reuse parameter (SRP). Both Type 1 SRP and Type 2 SRP are defined. In one example, the Type 1 or Type 2 SRP is a 5-bit parameter carried in the HE-SIG-A field of the OBSS PPDU, which can be a trigger frame, a response frame, a request-to-send (RTS)/clear-to-send (CTS) frame, and a data frame.

    Abstract translation: 提出了一种利用机会性发射功率控制（TPC）和清晰信道评估（CCA）进行空间重用的方法。 在机会主义TPC和CCA中，空间重用站（SR-STA）在某些情况下获得足够的知识以进行更积极的空间重用，使得其发射功率可以被调整以满足基于接收到的OBSS PPDU和对应的空间重用条件 空间复用参数（SRP）。 定义了Type 1 SRP和Type 2 SRP。 在一个示例中，类型1或类型2 SRP是OBSS PPDU的HE-SIG-A字段中携带的5位参数，其可以是触发帧，响应帧，请求发送（RTS ）/清除发送（CTS）帧和数据帧。

    Beam-change indication for channel estimation enhancement
    8.
    发明授权
    Beam-change indication for channel estimation enhancement 有权

    公开(公告)号：US10187124B2

    公开(公告)日：2019-01-22

    申请号：US15283168

    申请日：2016-09-30

    Applicant: MEDIATEK INC.

    Inventor： Jianhan Liu ,  Shuling Feng ,  Thomas Edward Pare, Jr. ,  YungPing Hsu

    IPC: H04B7/02 ,  H04L27/26 ,  H04L25/02 ,  H04B7/06 ,  H04W84/12

    Abstract: A method of transmitting and receiving a HE PPDU and perform channel estimation enhancement is proposed. The HE PPDU comprises legacy preamble, HE-STF, HE-LTF, and data. A beam-change indication indicates if the pre-multiplied beamforming Q-matrix is changed from legacy preamble to H-SFT, HE-LTF, and data portion. A value of 1 indicates that Q matrix is changed. A value of 0 indicates that Q matrix is unchanged and receiver should be safe to combine L-LTF and HE-LTF. The beam-change indication can be used to significantly enhance channel estimation at receiver. When there is no beam-change, receiver does not change operation during HE-STF and HE-LTF such that the channel estimations can rely on the combination of L-LTFs, L-SIG, RL-SIG, HE-SIGAs and HE-LTF.

    Rate Indication and Link Adaptation for Long Range Wireless Networks
    9.
    发明申请
    Rate Indication and Link Adaptation for Long Range Wireless Networks 有权
    长距离无线网络的速率指示和链路适配

    公开(公告)号：US20160073220A1

    公开(公告)日：2016-03-10

    申请号：US14848108

    申请日：2015-09-08

    Applicant: MEDIATEK INC.

    Inventor： James June-Ming Wang ,  Kai-Chun Chou ,  Li-Chun Ko ,  Ching-Hwa Yu ,  YungPing Hsu ,  Chih-Shi Yee

    IPC: H04W4/00 ,  H04W28/02 ,  H04W28/18

    CPC classification number: H04W4/008 ,  H04L47/26 ,  H04W4/80 ,  H04W28/0236 ,  H04W28/22

    Abstract: A method of fast link adaptation for Bluetooth long-range wireless networks is provided. A novel rate indication (RI) field is incorporated in a data packet to enable auto detection of rate adaptation at the receiver side. The data packet comprises a preamble, a first packet portion including the RI field, and a second packet portion including the PDU. The first packet portion is encoded with a first rate while the second packet portion is encoded with a second rate indicated by the RI field. The transmitting device raise/lower the encoding rate when the link quality is good/poor. The receiving device can provide recommended rate or link quality feedback information via an LMP message to help the transmitting device making rate adaptation decision. The transmitter can unilaterally decide the data rate for the second packet portion without receiver recommendation.

    Abstract translation: 提供了一种用于蓝牙远程无线网络的快速链路适配方法。 新的速率指示（RI）字段被并入数据分组中，以便能够在接收机侧自动检测速率自适应。 数据分组包括前导码，包括RI字段的第一分组部分和包括该PDU的第二分组部分。 第一分组部分以第一速率编码，而第二分组部分由RI字段指示的第二速率编码。 当链路质量好/差时，发送装置提高/降低编码率。 接收设备可以通过LMP消息提供推荐的速率或链路质量反馈信息，以帮助发送设备进行速率适配决策。 发射机可以在没有接收机推荐的情况下单方面地决定第二分组部分的数据速率。

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